Enhanced tunability for low-dielectric-constant ferroelectric ma

Details Enhanced tunability for low-dielectric-constant ferroelectric ma Enhanced tunability for low-dielectric-constant ferroelectric ma

1993-04-01

1997-03-04

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 63, 264 67, 26417711, 26417712, 264138, 264241, C04B 3526, C04B 3700

Patent

active

056076312

ABSTRACT:
Spatial thinning in no more than two dimensions is used in order to lower both the effective dielectric constant and the dielectric loss tangent of ferroelectric ceramics, while retaining a substantial fraction of their tunability. By not thinning in the third direction, along which the dc bias field is applied, the ferroelectric material maintains the connectivity between elements of the ferroelectric structure that is essential to retaining the tunability. Examples of one-dimensional structures (30) include small diameter columns (28, 32) of dielectric material embedded in a dielectric matrix (26, 34). Examples of two-dimensional structures (21) include square (22) and hexagonal (24) cells comprised of ferroelectric material filled with inert dielectric material or vice versa.

REFERENCES:
patent: 4232214 (1980-11-01), Shioi et al.
patent: 4245146 (1981-01-01), Shioi et al.
patent: 4870539 (1989-09-01), Chance
R. J. Tonucci et al, "Nanochannel Array Glass", in Science, vol. 258, pp. 783-785 (30 Oct. 1992).
Electro Nucleonics, Inc., "Controlled-Pore Glass" (Product Bulletin).
Galileo Electro-Optics Corp., "Glass Capillary Arrays" (Product Bulletin).

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